Ant Custom Properties

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Setting properties in the build file is the first method of providing custom properties with element in an ant build file.

Ant Custom Properties

Setting properties in the build file is the first method of providing
custom properties with <property> element in an ant build file.
Unlike the <project> and <target> elements, the <property>
element is defined as a task. This means that you can include <property>
elements inside a target depending on certain conditions or depending on which
target has been selected. You can also set properties at the beginning of a
build file so that they apply to the entire build file. This means that you can
set important constant values in a central location so that they are easy to
find and change. You should remember that properties set inside a target override
any properties set at the project level. Naming again comes into this and you
should consider whether your target level properties should be identified as
such by using a prefix to avoid confusion and possible namespaces clashes.

The simplest and most obvious use of the <property> task is to set
a property using a name value pair, as shown below.

You can set the value of a property to the value of another property. This can
be useful if you will be referencing a verbose built-in property multiple
times. This is as simple as placing a property marker in the value attribute of
a <property> task as shown below in source code: